Making a diagnosis of overdiagnosis

Prostatic cancer screening

Illness is identified by taking a history, examining symptoms and signs, and often by taking some tests. 

Many of us seem unwell as much testing is happening - roughly 50 million diagnostic tests, 500 million biochemistry and 130 million haematology tests are performed annually in the NHS. In the US, it's another order of scale, with 14 billion laborato…